Advancers

Allis-Chalmers Energy
ALY, +3.23%
jumped more than 60% following an announcement late Thursday that it will be bought by Seawell Ltd. in a deal valued at about $890 million, including assumed debt. The companies expect the transaction to close as soon as the end of the year.

Dynegy
DYN, +0.66%
closed 63% higher. It will be acquired by an affiliate of Blackstone Group LP
BX, -0.10%
in a deal valued at about $4.7 billion, including the assumption of debt. Dynegy shareholders will receive $4.50 a share in cash for each outstanding share they own, the company said. Read related story on Dynegy

Trubion Pharmaceuticals Inc.
TRBN
skyrocketed 50% after Emergent Biosolutions Inc.
EBS, +0.21%
said it plans to buy Trubion for $97 million upfront and up to an additional $39 million if certain drug-development and manufacturing milestones are met.

Intersections Inc.
INTX, -1.75%
jumped 34% after reporting second-quarter net income of 29 cents a share, recovering from a loss of 15 cents a share in the same quarter last year.

ClearOne Communications Inc.
CLRO, -0.39%
soared 17% after reporting second-quarter earnings of 4 cents a share compared with a loss of 4 cents in the same period last year.

Tianli Agritech
OINK
surged 19%. Earlier this week, the company reported that its second-quarter profit more than doubled to 26 cents a share. Tianli is a hog company headquartered in China.

Park Sterling Bank
PSTB, -1.50%
skidded 22% to $6.15. The bank earlier said it priced 23.1 million common shares at $6.50 a share as part of its stock offering.

Astea International Inc.
ATEA, +5.71%
fell 25% after reporting its second-quarter loss widened to 37 cents a share from 9 cents a share in the year-earlier period.

PDL Biopharma Inc.
PDLI, +1.04%
slumped 16% on news that Roche Holdings might discontinue certain royalty payments to the company. The royalties in dispute amounted to about 30% of its revenue in the first half of this year and are valid into 2014, according to PDL.

GlobalScape Inc.
GSB, +5.99%
fell 14%. The Internet software company on Thursday reported its second-quarter profit slid to a penny a share from 5 cents a share in the same quarter last year.

AeroCentury Corp.
ACY, -0.98%
shed 16%. The independent aircraft leasing company on Thursday reported its second-quarter net income tumbled to 33 cents a share from 89 cents a share in the year-earlier quarter.

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